I like this idea, i like the big box store challenge, I like the old threads of 5 year zelcova or 5 year trident challenges that I have read through too.
I won't be participating though, I don't have a suitable tree and am low on bonsai funds due to some offseason pot spending. So unless a really cheap tree comes about, i'm out.
For what its worth i post just about all of my trees here on BNut and continuously try to update. No real show stoppers so i understand there not being such great interest, but i always show my work, what i'm doing and what i'm trying to accomplish. I haven't been at it long and am no longer in my club so BNUT is pretty much all i got right now. This progression contest will be a wonderful thing to follow over the next year.